You find it unhelpful. I find it helpful.
About an hour ago, I did this very thing. But I also answered the question.
There are people who are not on these boards anymore who had really positive input. They are no here to post anymore - but their ideas are just as valid. Its no different than recommending a good book.
Now, at the risk of being 'unfriendly' - if you view peoples posts in a negative tone, doesn't mean they are.
You learn from the present, and you learn from the past... and you can be guided vicariously. People will aways answer the question - if a couple of people are being helpful in listing older posts - good for them. You have a problem with it, deal and move on. I - as a person whos been here for a while enjoy re-reading the older posts. Brings back memories, makes me smile and helps me remember people from the past who has put ideas in my head that I now use in my present (which at the time, was the future).
I would hate to see that knowledge lost just because a handful of people find it 'condecending'.
Peace and Rapture